Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.

Allows a pair of doors to open and close together to gain full use of the entire opening without the necessity of releasing and securing the inactive door after every operation.